Incandescent-lamp socket.



H. MARKS L S. HELSEL.

INGANDESCENT LAMP SOCKET.

APPLICATION FILED MAR.13,1913.'

Patented Mar. 3, 1914.

3 n vente@ ,s Hmm-s un? f5' Helsel,

Simi/Mmmm INCAIWDRSCEN'I' limi. 1%

nl' {hihihi-iii, und hihihi of Pcnnsyifmiiii., huw

iiivohhwi Garmin new :mil useful iiiipim'emontiii liiwiiiiilfifsiaifiilfi'liiiiip rliukutss; :mii we (lo ilifchii'ff thu l`i lliiwirig hi iw :i full, View, und ammi (lecrigitimi of this ihwirftirm, sii'h 'will @risibile minimis iililiiitl .iii tim iii-l; lo which il hppmtziihs lo make und use the mine.

This iiivfeiilimi relatifs tri ii'fipiiwmiiiijeiils 'in sockets 'im' imzzuiifh. anni electric hiiiips.

Oms uhjcci, of .tlm iiivmilimi is th gjnoviii :i Snicket 'for inczindocnt ivlcclric lamps haw ingv :in impruwfl fffiiisti'iiclioii :imi arrange mont mi' locking menhniiiaiii whci'ehy :i lamp when sci-ewci thiimh Ummm he remm'ci'l therefrom wiliiouil breaking the liiiiip limi Iwi' oiiifzcl/ is; lo provid@ n lmnp sockel. of hizs cimi'zifrtci' having' 11191111- Whiziiiiq/ the imking niieclmiiisiii may im lhifuwh mit of ipci'iiliwii :imi this sockel ruiiipifij/ml in the, imm! niniiiivr.

.'Iu liv :wennifmiiyng drawings; Figline 'l is; .i Central imigfitiifliiizii schlimm] i'ihw mi ii, wicket crinslruclmi in :icmu'dui'iw with mii' invciilioii; Fig. is :i similar 'View hilfen :it slihxtuiitinlly i'ifght :ingles tu Vig'. l; Fig,

simil ifernm'ml; Fig. nlis :i ciufss Sectional View tinker: mi [alle line im/i of Fig. 3; Fig. fj is` :i similar viuw hikmi im lh@ lima 54-5 of Fig. B looking.; tow-:ml thi; inum- @mi i* lh@ lamp l'eccptzue ol the socket; Figi. il :i im i'aiil pci'sspectivc View of the Sil'iiihi' lurking pawl which is arranged im ih@` hmm weeptzicie to engage and lool: bh@ ping of the. lamp when sci-owed into the i'cceepncle,

Referring more pzut'iculm1y-in the drinn# ings, ldenotes the shell or cursing of the socket which may be 0f the usual Construcilion except that thi casing is slightly longer than the casings of the usual fmm of sockets.

In the shell oir-casing l is arranged the usual lining or insulation of non-conductingr miiterial which insulitcs the causing 'from` the lamp receptacle and other partis of th socket. In the-'Lipper poi-tion of the shell 0i. leasing i HP siii-hifi (hi-misi'h .sifiiiii hlwim i hhi'iwii., iiii the faiilm m' [www and of Hm i i.; 1S ii'ii'med :m iiiiiiiiiz'iil imwim ii :mii hhirfiigi i.'m'iiiifri :i iii-lm; El (l'iprifri lliiil; iifiifx ahh: point intimi i: this ihm?? @mi ii wiwlh @sus und im thu hh:y piu' irl thi'migh ith@` hlm im m upper will @hihihihi with :i 1mi; 'i3 if iliiiiri--siiiiiz ih thu ihm zy nd 0i" the hlocic G :rnd iii prisilirih 'hi he oiiggfi ufl by izhii ends of lliiiI irrihi'aifi irwizilihi" .f mi" lh@ witch liey. The mit, holt nml ihn {mwi il ifslmiicfi iheiehy thus iffii'ih him lui-mimi olf' lh#A 'ii'cilit in which the minimi: i5 :'ii'i'miiflifi 'when th@ hay li?, turned l0 chfgn e ih@ ammini, riiffmheij 5 with the nut imii lumi @nfl ol lim holt.

-v i||iu l i0 lhv hlmk Il iH the lamp recep- Mtmhe i iv .lniii iermiphu'lc lining; in the form of :i ihin xiiilzil'si'irlwt having; wish loi-nml in the Sides ifhvimf ai emit-inw om iin-mui if with which ihv thi-(sailed plug m ihi imi-113i if: ieiiiggiiiguifi when thu lutter is :iiipiimi in the, i-iof'iiit. ',lhu i'emiilzwli li is l'evoliihiy filippmliffi :iwi insti-,nml 'to the liinck ii-hy il 'Screw 'lll which is ahigngifffl with im ima-hinting dif-sii li :iiwxihiiwi irilhi. 'iimer omi (if lzhii rrrceptimle ifi und having :i ilizimelei' Lumix-590mlii'ig siihstiiubzilly to what of the iiiimir iliriiiielio'liil the receptacle. @n the iiiimi' sills of the: disk 17 is :i c-eii'i'aily diaphswi boss 18 which piojecls into and has n i'eyoluhle engagement 'with lihc socket Si in` the mitm* @mi nl the biock (i asshowp. (in the mitm' headed end of the Sm'ew `li is :i metal washer 1'9 which with lnhiv head of the @screw forms the umher contact.' terminal of the lfctric circuit. The inner end of the screw" 16 `is engaged with a flireadd apex inur Q() formed in th right v:mgiilm' inner end 0l i binding plum 2l which is secured in :iA recess in one side oi the .porci-:imm

i writer 0 the i messed or othr` i switch block 2 and which h'as therein abmavolved in one direction thus holdin ment-with the inner end of the'larnp recep.

circuit and the current will thus pass.

l a direction for unscrewing the lamp, thus 4site current 'conducting wire is connected and thereby permitting the lam the lamp will revolvethe receptacle in a` shoulder 25 will depress the pawl and pass A one terminal of the electric circuit and as .the ,plug on the end'of the lamp when said lwill be made through the usual central conwhich is constructed from a coil of spring ing screw 22 with which one o f the current conducting wires iseonnected. The oppowith a -binding screw 23I inthe bracket or bearing late 24 of the lshaft of. the switch key in' t e other terminal. l

' On the inner end of the lamp receptacle 14 near the outer edge thereof is formedy a beveled stop shoulder 25 which is brought into engagement with the end of the spring pawl 11' when the lamp receptacle is re,-

the ref irection to bel screwed into the receptacle .in t e usual manner. `After the lamp has been screwed into the vreceptacle any attempt to unscrew ceptacle against turning in this lreverse direction which movement of the receptacle will not be interfered with by the pawlfas the beveled surface of the stop beneath the same as willbe readilyunderstood.

As hereinbefore stated the pawl 11 forms this 'pawl is in continuous frictional engagetacle, the latter .will be connected with the through the receptacle to the outer shell of plug is Ascrewed into the 'receptacleu The other connection of the lamp with the socket tact 'of the lamp plug with the screw 16 and washer 19 which revolublysupportthe lamp receptacle and attach the same to the block 6 as hereinbefore described.

ln order to positively hold the threaded plug of the lamp from being vunsere'wed from the threaded lampi/receptaclev 14, we provide a spring lamp locking pawvl 26 wire engaged with the coiiirugations or threads on the outer side ofthe lamp rcceptacle substantially midway betweenthe ends theredf. One end of the spring pawl is bent inwardly and beveled toform a tooth 27 which progeets through a slot 28 in one side of th'ereceptacle and is adapted to engage the plug of the lamp whenthe latter is screwed into the receptacle. The beveled end of the tooth 2T will permit the plug of the lamp toibo revolved in a direction for screwing the same into the receptacle but said end of the tooth will be caused to bite into the surface of the lamp plug when the latter is turned in a reverse direction or in positively-preventingthe lamp from being unscrewcd from the socket as long as the re-jceptacle 14 is loose or revolves on the socket. V:ln-order to permit the socket to boemployed in the usual manner or to permit thev unscrewing the lamp, said means comprising a setscrew29 which has a/threaded engagement with a. bracket 30 depending from one I side of the receptacle supporting block 6. The bracket 30 is preferably formed integral with, or has its inner end bent at right angles and provided with a threaded aperture to form a nut 31' with which the inner end of one off'the bolts 7 which fasten the receptacle supporting block 6 t'o the switch block 2 as hereinbefore described. The set screw 29 when thusarranged is adapted to be screwed inwardly and into engagement )with an aperture 32 formed in one side of" ithe lamp receptacle thereby locking the latter against turning' in either direction which will thus permit the lamp to be screwed into and unscrewed from the receptacle. When the set screw 29 is disengagedfrom the aperture in the lamp receptacle and the latter thus left free to revolve in the manner described it will be seen that when a lamp is screwed into the receptacle and locked therein by the pawl 26 the lamp cannot possibly ebe removed'without breaking the globe or bulb thereof which will permit the shell 0r casing 1 to.be slipped down olf from the switch block 2, receptacle supporting block 6 andlamp receptacle whereupon a suitable instrument may be inserted beneath the end of the spring pawl 26 and thetooth thereof retracted which will permit the removal of the plug of the broken lamp, while the receptacle is being held against turning by the Y i hand asivill be readily understood. v

From the foregoing description taken in connectionwith the accompanying drawings7 the construction and operation. of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion and the minor details of construction may be resorted to Without departing from the principle or sacriiicing any of the advantages of the invention as claimed. l

Havingthus described our inventiomwhat we claim is: c

l. In Aan incandescent electric lamp socket, the combination with the switch supporting block and switch mechanism therefor of a lamp receptacle revolubly supported on said switch block, means to loclr said lampv receptacle against turning in adirection for screwing a lamp therein, said means permitting the receptacle to be freely revolved in a reverse direction, and means to fasten said receptacle against turning in either direc` tion. f 1.

2. In an incandescent electric lamp socket the combination with/the switch supporting block and switch mechanism of the socket, lao

of receptacle su rigi ,se

cured to said`witi block, 'a lamp recegtaele Y'p revolublysecuredpto said supporting lock,q

-a, spring Egwl arranged'won said supporting' block, velred' stop shoulder formed on Aamici lampreceptacle and adapted to' be brought ztoengagement with the pawl on said supporting-bloei; whereby the receptacle is locked'agamst turning'in the direc tion for, screwing a lamp therein -but is permitted to freely revoke-iii theolpposite direction therebypreventing the am from being unscrewed :from lthe reoeptac e,' and a set screw carried b sid receptacle suporting block and a; apted to be screwed 1'5 into enga ement with the lamp receptacle' whereby t e latter is locked against turning in either direction.

I'n testimony whereof we have hereunto set our hands 1n presence of two subscribing 20 witnesses.

. HARRY MARKS.'

SANFORD HELSEL. Witnesses:

JOHN Hr STEPHENS, MARY L. 'OPPERMAM 

